Re. the first 2 lines - in the 1920 German silent movie, 'The Cabinet of Dr. Caligari', there is a scene in which the insane director of the hospital declares,
"I must know everything. I must penetrate the heart of his secret! I must become Caligari!" - subsequently the same words appear outside to him, like graffiti - "You must be Caligari!" - Caligari being a murderous showman.
Re. the first 2 lines - in the 1920 German silent movie, 'The Cabinet of Dr. Caligari', there is a scene in which the insane director of the hospital declares,
"I must know everything. I must penetrate the heart of his secret! I must become Caligari!" - subsequently the same words appear outside to him, like graffiti - "You must be Caligari!" - Caligari being a murderous showman.